Hot water and air tank for dentists&#39; use.



H. W. LE FEVRE.

HOT WATER AND Am TANK FOR DENTISTS USE.

APPLICATION FILED 1UNE14. 1915.

Patented Doc. 19, 1916.

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Qqirncow Hozncq HARRY W. LE FEVRE, 0F DENVER, COLORADO.

HOT WATER AND AIB TANK FOB DENTISTS USE.

Specication of Letters Patent.

Patented Dec. 19, 1916.

Application led .Tune 14, 1915. Serial No. 33,925.

To allwhom it may concern.-

Be it known that I, HARRY W. Ln FEVRE, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Hot Water and Air Tanks for Dentists Use; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it .appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in tanks adapted to supply hot water and hot or warm air under pressure, being more especially adapted for use by dentists. The necessityfor the use of warm Water and air by dentists for spraying the gums and teeth :for obvious reasons, during their work is Well understood. vHeretofore so far as I am aware no single apparatus has been available for supplying both air and water for this purpose.

My object is to provide a single apparatus, readily accessible for supplying both warm air and water under the necessary pressure, so that all that will be necessary in order to change from one to the other, is to lay down are nozzle and pick up another these nozzles l ng respectively connected with flexible e lc-ali'ig from the tank.

c. my `-mproved construction the tank conta vater which is kept at the desired temper-:taie by means of a Bunsen burner which is suitably connected with a source of gas supply, the burner being suitably connected with the bottom of the tank. The burner stand as illustrated in the drawing forms a support for the tank. It is evident, however, that the water in the tank may be kept at the proper temperature through the agency of any suitable heat source. The Water is removed from the tank by air pressure supplied by connecting the upper extremity of the tank chamber with a source of air under pressure, the water escaping from the tank through a pipe having its inner extremity which is open, located close to the bottom of the tank, the upper extremity of the said pipe protruding from the top of the tank and with which a flexible tube equipped with a suitable nozzle, is connected. Also located within the tank and surrounded by the water therein, is a coil of pipe whose extremities protrude also from the top of the tank and are respectively connected with flexible tubes, one of which leads to a source of air under pressure, While the other is equipped with a nozzle for delivering air to the mouth. This air is warmed or sufliciently heated for the purpose, by passing through the coil of pipe which is submerged by the hot water in the tank as heretofore explained. Each metal pipe extremity where it extends above the tank, is equipped with a valve for regulating supply of air or water as the case may be. The tank is further equipped with an inlet pipe connected with its upper extremity and also equipped with a tube leading to a source of Water supply.

Having briefly outlined my improved construction I will proceed to describe the same in detail, reference being made to the accompanying drawing in which is illustrated an embodiment thereof.

In this drawing which is a central vertical section taken through the apparatus, let the numeral 5 designate the tank which as shown is cylindrical in shape and Whose bottom is equipped with a depending cone shaped bracket 6 having a bottom opening 7 adapted to receive a Bunsen burner 8 which is connected with the bracket by means of a set bolt 9. The burner is mounted in a socket 10 formed in the upper extremity of a supporting base 12. A pipe 13 is connected with this base for supplying gas to the burner the latter being equipped with perforations 14 through which atmospheric air enters. The bracket 6 is provided with openings 15 through which the necessary air is brought into contact With the gas as it leaves the upper extremity of the burner, for combustion purposes.

The top of the tank is provided with a relatively large interiorly threaded opening 16 into which is screwed a closure plate or cap 17 Which isy formed relatively heavy, the top of the tank-where the opening is located being reinforced as shown at 18 for the purpose. The screw cap 17 is provided with a top flange 19 overlapping the upper extremity of the reinforced part 18, a gasket 20 being located between the cap and the part 18 in order to form a fluid tight joint. This screw cap 17 is provided with openings 21, 22 and 23 through which are same being respectively equipped with valves 74, 75 and 76 whose movable members are provided with hand pieces to facilitate manipulation. With the upper extremities of these pipes are connected flexible tubes 35, 36 and 37 respectively. The outer extremity of the tube 35 is equipped with an instrument 38 for spraying air into the mouth, while the corresponding extremity of the tube 36 is provided with an instrument 39 for spraying water into the mouth. The outer extremity of the tube 37 is connected with a source of air under pressure (not shown).

The top of the tank beyond the screw cap 1'7 is provided with openings 40 and 41 through which are passed bushings 42 and 43 respectively, to. whose outer extremities are applied coupling sleeves 44 and 45 which coperate with glands 46 to form fluid tight joints around pipes 47 and 48 which pass through the said bushings and extend above the coupling sleeves where the said pipes are equipped with valves 49 and 50 respectively. Connected with the upper extremities of these pipes are iexible tubes 51 and 52. The outer extremity of the pipe 51 leads to a source of water supply (not shown) while the corresponding extremity of the tube 52 is in communication with a source of air under pressure (not shown).

The inner extremity of the pipe 47 which supplies water to the tank, terminates a short distance below the top of the tank, which is also true of the pipe 48 which sup- .plies air under pressure for expelling the water 53 from the tank. The pipe 32 extends downwardly into the tank, its' inner extremity being open and terminating a short distance above the bottom of the tank, sufficient space being left to permit the water to enter this extremity of the pipe freely for purposes of escape when lthe valve 75 is open for the purpose, and air is supplied above the water through the pipe 48, which is accomplished by opening the valve 50.

The inner extremity of the pipe 33 merges into a coil 54 which is submerged by the water 53 when the tank is filled. The lower convolution of this coil merges into an upwardlyv extending pipe 55 which merges into the exterior pipe member 31 through which the air passes tothe instrument 38 as heretofore explained, assuming that the valve 74 is open. In other words the air utilized by the instrument 38, enters the pipe coil 54 by way of the pipe 33 through the tube 37,- and after traversin the coil passes out of the tank through t e pipe 55, the external pipe member 31 and the tube 35 to the said instrument.

A with the atmosphere.

` Upon one side of the tank is mounteda gage glass 62 while upon the opposite side.

is mounted a thermometer 63, the lower extremity of the thermometer extending into an exteriorly located receptacle 64 which is mounted upon the tank and lilled with Water and by virtue ofthe fact that the receptacle is mountedupon the tank whereby the wall of the tank forms one of the walls of the receptacle, the water within the latter is maintained at the same temperature as that within the tank. Hence the thermometer whose lower portion-is submerged in the water of the receptacle, is very sensitive and accurately indicates at all times the temperature of the water in the tank..

The tank is further provided with a faucet 65 which is connected with the lower portion thereof. The upper extremity of the ment 39 which is controlled by the operatorwhereby the water is allowed l to escape whenever desired, said water having the necessary pressure due to the entrance of air under pressure through the valve 50 at the top of the tank as heretofore explained. When it is desired to use air in the mouth of the patient, the valves 76 and 74 are opened, and thel air passes from the source of supply through the tube 37, the pipe 33, the coil 54, the pipes 55 and 31 and the tube 35 to the instrument 38. The pressure of this air is due to the fact that the pipe 37 is connected with an air tank or receptacle containing air under the necessary pressure. The instrument 38 is of such character that the air is only allowed to escape at the will of the operator. As the water 53 within the tank is kept at the desired temperature by the employmentV of any desired source of heat, (a Bunsen burner 8 beingshown), the

tir is heated to the desired temperature while passing through the coil 54 Aand the pipe 55. It will thus be observedlthat the water within the tank performs the double function of supplying the instrument 39, and also that of raising the air to the necessary temperature while passing through the coils and pipe 54 and 55 respectively Within the tank.

Having thus described my invention, what I claim is,-

1. A combined apparatus for supplying warm Water and warm air, comprising a tank adapted to contain water, a coil of pipe therein adapted to be submerged by the water, the extremities of the plpe passing through the top of the tank, and respectively connected with a source of air under pressure, and an instrument for controlling the escape of air, a conduit in communication with the Water of the tank at one extremity and connected at its opposite extremity with an instrument for controlling the escape of water, and means for introducing air under pressure into the tank above the Water.

2. Apparatus of the class described comprising a tank adapted to 'contain water, three pipes passing through the top of the tank, means for forming fluid tight joints around the said pipes, a coil of pipe within the tank, two of said pipes formlng the terminals of said coil and being respectively in communication with a source of air under pressure and an instrument for dispensin air after passing through the coil, the thir pipe being in communication with the Water of the tank at one extremity and at the opposite extremity with an instrument for dispensing Water, and means carried by one of said coil terminals for controlling the passage of air.

3. Apparatus of the class described com- I prising a tank adapted to contain water,

three pipes passing through the top of the tank, a coil of pipe within the tank, two of said pipes forming the terminals of said coil and being respectively in communication with a source of air under pressure and an instrument for dispensing the air after passing through the coil, the third pipe being in communication with the Water of the tank at one extremity and at the opposite extremity with an instrument for dispensing water, and means for introducing air under pressure into the top of the tank above the water.

4. Apparatus of the class described comcoil, these terminals being respectively in communication with a source of air under pressure and an instrument for dispensing the air after passing through the coil, the third pipe being in communication with the water of ther tank at one extremity and at its opposite extremity with an instrument for dispensing water, and valve-controlled means or introducing air under pressure to the top of the tankabove the water.

Apparatus of the class described comprising a tank adapted to contain water, three pipes passing through the top of the tank, two of sald pipes forming the termi-` nals of the said coil and being res ectively in communication with a source o? air under pressure and an instrument for dispensing the air after passing through the said coil, the third pipe being in communication with the water of the tank at one extremity and at the opposite extremity with an instrument for dispensing water, valve-controlled means for introducing air under pressure to the tank above the water, and valvecontrolled means for introducing water to the tank.

6. Apparatus of the class described comprising a tank adapted to contain Water, three pipes assing through the top of tank, a pipe mem r within the tank, two of said pipes forming the terminals of said pipe member and being respectively in communication with a source of air under pressure and an instrument for dispensing the air after passing through the said pipe member, the third pipe being in communication with the water of the tank at one extremity and at the opposite extremity with an instrument for dispensing the water, and means for introducing air under pressure to the top ofthe tank.

7. Apparatus of the class described' comprising a tank adapted to contain water, three pipes passing through the top of the tank, a pipe member within the tank, means for supplying the tank with water whereby said pipe memberis submerged, two of said pipes forming the terminals of said pipe member and being respectively in communication with a source of air under pressure and an instrument for dispensing the air after passing through said pipe member, the third pipe being in -communication with the Water of the tank at one extremity and at the opposite extremity with an instrument for dispensing water.

8. Apparatus of the class described comprising a tank adapted to contain water, three pipes passing through the top of the tank, a pipe member within the tank, means for supplying the water to the tank whereby said member is partially submerged, means for maintaining the Water in the tank at the proper temperature, a temperature indicating device exteriorly mounted on the tank,

an exteriorly located water containing receptnele also mounted on the tank, the wall of the latter forming one wall of the said receptacle, the temperature indicating device being partially submerged by the water within the said receptacle, two of said pipes forming the terminals of said pipe member and being respectively in communication with a, source of air under pressure and an instrument for dispensing the air after passing through the pipe member7 the third pipe being in communication with the water of the tank at one extremity and at the opposite extremity with an instrument for dispensing water.

In testimon whereof I afiix my signature in presence o two witnesses.

HARRY w. LE Enviar.` y Witnesses A. J. OBRIEN, A. EBERT OBRIEN. 

